A bail type-unlocking device for an opto-electronic module, which pertains to an unlocking device for a hot pluggable type opto-electronic module in the optical communication field. The unlocking device includes: a bottom housing; an operating unit; a latching unit; an elastic element; and a briquetting; wherein: the latching unit is movably engaged with the bottom housing; the elastic element is provided between the latching unit and the bottom housing, and the latching unit can be movable relative to the bottom housing under the elastic force of the elastic element; the operating unit is configured to be engaged with the bottom housing, when an external force from an operator is applied to the operating unit, the operating unit pivots around a pivot axis thereof with respect to the bottom housing to drive the latching unit so that the latching unit can be movable between a locked position and an unlocked position with respect to the bottom housing; and the briquetting is fixed on the bottom housing and engages with the operating unit, when the latching unit is located at the unlocked position, the briquetting restricts the pivot movement of the operating unit around the pivot axis with respect to the bottom housing.